Looking for a rear locker, an air operated one would be nice considering I have on board air... has anyone put an air locker in one of these? I have a 2004 Blazer ZR2

 

I haven't ever seen a electric or air locker offered for these trucks. I do have a new locker for one if you're interested but I'd need your spline count. I think your truck has a 30 spline count if I'm not mistaken and should be a 8.6 rear? I thing the earlier units were 28 spline on the 8.5s. Is your gov-lock broken?

 

I want to say I've seen selectable lockers available for the 8.5" ten bolt. Search up arb's website, see if they have an application listed

 

I’m not the greatest with diffs but does it matter if it’s an 8.5 or 8.6? I found this but it’s for the 8.5...

https://eastcoastgearsupply.com/i-22...30-spline.html

edit:
found this
https://www.justdifferentials.com/AR...p/arbrd222.htm

 

I stand corrected. I wasn't aware they were available for 10 bolts. They're expensive little goobers aren't they! It looks like you'll need a compressor for it as well.

 

They’re not cheap haha! Ive got On Board Air so that’s covered

 

Just to make things clear. The second one I linked would be the correct one?